While bats live in air and dolphins live in water, both use a biological form of sonar technology called echolocation to see with sound! The specifications in dolphin and bat biosonar systems are so many, so well-integrated, and so precise, could they really have developed at random in two completely different environments?
Paleontologists dig up all kinds of fossils, mostly just small bones or sea shells. But occasionally they discover unusual fossils, like squid with ink, lizards with skin, or even a T. Rex with blood!
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